Kanye West was called out for being on his phone by an actor in the Broadway musical he was watching

Kanye West attending the opening night of new Broadway musical, 'The Cher Show,' with his wife Kim Kardashian-West.

A cast member spotted the rapper on his phone and called him out on Twitter.

The rapper apologised for his actions, saying, 'Please pardon my lack of etiquette.'

Kanye West has apologised after being called out by a cast member for looking at his phone during the opening night of a new show about Cher's life on Broadway in New York City.

Jarrod Spector, who plays Sonny Bono in "The Cher Show," was clearly unimpressed by West's theatre manners (or lack of) as he attended with his wife, Kim Kardashian-West.

"Hey @kanyewest so cool that you're here at @TheCherShow!" he tweeted. "If you look up from your cell phone you'll see we're doing a show up here. It's opening night. Kind of a big deal for us. Thanks so much."

West evidently got the message, as he replied on Twitter: "The dynamics of Cher and Sonny's relationship made Kim and I grab each other's hand and sing 'I got you babe' please pardon my lack of etiquette.

"We have so much appreciation for the energy you guys put into making this masterpiece."

A representative for West also told the New York Times: "Kanye was on his phone taking notes. He loved the show and was incredibly impressed by the production."

The incident highlights how stage actors are becoming more willing to call out poor theatre etiquette when they see it. Last week, at a preview of "The Cher Show," one actor asked an audience member to stop recording her performance mid-song.

Theatre critic Michael Paulson tweeted: "Did I just see @StephanieJBlock, while performing 'Believe' in @TheCherShow, tell a patron to stop videotaping her, without missing a step or a note? Why yes, I did."

Block then replied and said: "Yes, you did... off mic and I even said 'please.'"